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Old September 22nd 19, 03:25 PM posted to alt.comp.os.windows-10,alt.windows7.general,comp.sys.ibm.pc.hardware.chips,comp.sys.intel,alt.comp.hardware.amd.x86-64
Yousuf Khan[_2_]
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Default What is the absolute smallest instruction set do you need to makea working computer?

On 9/22/2019 2:26 AM, VanguardLH wrote:
https://en.wikipedia.org/wiki/One_in...n_set_computer
Concept proposed back in 1956.

It is a computational model used for teaching. It would be too slow for
physical implementation. That it can be done doesn't mean anyone cares.


Maybe, maybe not. It may not have been anything more than a curiosity in
the 50's. Back then memory was very slow, and the caching technologies
that have evolved over the decades was not available yet back then. So
back then you had to make sure you explicitly put everything into
registers. But these days, with your typical x86 machine being really a
RISC processor emulating a CISC processor, and they've come up with so
many automatic caching techniques that registers are no longer needed,
and you can really work directly on memory without any performance
penalties nowadays.

Yousuf Khan